Sounds like you got your set up dialed in.

I will make the assumption you are practicing with (or have taken a few shots) with your broadheads, and your bow is tuned.

One other thing I thought of, when I practice during the season, I try and wear the gloves I will be hunting in (or ones similar, my hunting ones are 'clean' ) and my hat (boonie, big brim, takes some time getting used to) if the weather is a bit cooler I will put on a heavy coat also, to simulate my hunting jacket.

All these things could possibly throw your form off, and when you get out on stand you will be confident that your mechanics are good. Now all you have to do is make sure you dont shoot through some nearly invisible brush like I did last year [>:]

Finally, great way to build up confidence is take a lower pressure shot and harvest a doe. Not only will you gain the confidence that you know you can make the shot, you will fill up your freezer also.

Been bow hunting 23 years now and if you can think of a way to mess up, I probably have, every time out it is a learning experience.